@mixin box-sizing($val) {
  -webkit-box-sizing: $val;
     -moz-box-sizing: $val;
          box-sizing: $val;
}

@mixin user-select($val...) {
  -webkit-user-select: $val;
     -moz-user-select: $val;
      -ms-user-select: $val;
          user-select: $val;
}

@mixin box-shadow($shadows...) {
  -webkit-box-shadow: $shadows;
          box-shadow: $shadows;
}

@function inverse-side($side) {
  @if      $side == top    { @return bottom; }
  @else if $side == bottom { @return top; }
  @else if $side == left   { @return right; }
  @else if $side == right  { @return left; }
}

@mixin linear-gradient($gradientLine, $colorStops...) {
  background-image: -webkit-linear-gradient($gradientLine, $colorStops);
  background-image:    -moz-linear-gradient($gradientLine, $colorStops);
  background-image:      -o-linear-gradient($gradientLine, $colorStops);
  @if length($gradientLine) == 2 {
  background-image:         linear-gradient(to #{inverse-side(nth($gradientLine, 1))} #{inverse-side(nth($gradientLine, 2))}, $colorStops);
  } @else {
  background-image:         linear-gradient(to #{inverse-side($gradientLine)}, $colorStops);
  }
}

@mixin radial-gradient($gradient...) {
  background-image: -webkit-radial-gradient($gradient);
  background-image:    -moz-radial-gradient($gradient);
  background-image:      -o-radial-gradient($gradient);
  background-image:         radial-gradient($gradient);
}

@mixin transition($transition...) {
  -webkit-transition: $transition;
     -moz-transition: $transition;
       -o-transition: $transition;
          transition: $transition;
}

@mixin transition-property($properties...) {
  -webkit-transition-property: $properties;
     -moz-transition-property: $properties;
       -o-transition-property: $properties;
          transition-property: $properties;
}

@mixin transform($transform...) {
  -webkit-transform: $transform;
     -moz-transform: $transform;
      -ms-transform: $transform;
       -o-transform: $transform;
          transform: $transform;
}

@mixin clearfix {
  zoom: 1;

  &:before, &:after {
    content: '';
    display: table;
  }

  &:after { clear: both; }
}

@mixin inline-block {
  display: inline-block;
  vertical-align: baseline;
  zoom: 1;
  *display: inline;
  *vertical-align: auto;
}

@mixin hide-text() {
  font: 0/0 serif;
  text-shadow: none;
  color: transparent;
}

@mixin hidpi {
  @media only screen and (-webkit-min-device-pixel-ratio: 1.5),
         only screen and (min-resolution: 144dpi) {
    @content;
  }
}
